湿式摩擦离合器挤压过程及接合特性分析  

Analysis of squeeze process and engagement characteristics of wet friction clutch

作　　者：黄伟 鲍和云[1] 朱楚 朱如鹏[1] HUANG Wei;BAO Heyun;ZHU Chu;ZHU Rupeng(National Key Laboratory of Science and Technology on Helicopter Transmission,College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;National Key Laboratory of Science and Technology on Helicopter Transmission,Hunan Aviation Powerplant Research Institute,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China)

机构地区：[1]南京航空航天大学机电学院直升机传动技术重点实验室,南京210016 [2]中国航发湖南动力机械研究所直升机传动技术重点实验室,湖南株洲412002

出　　处：《航空动力学报》2022年第9期1992-2000,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(51975274);国家科技重大专项(J2019-Ⅲ-0023-0067)。

摘　　要：针对湿式摩擦离合器接合过程中的挤压机理及微凸体接触问题,综合考虑摩擦片表面油槽结构,材料渗透性等因素,根据修正雷诺方程和K-E(Kogut-Etsion)接触模型,对湿式摩擦离合器的挤压过程中的动压承载力、微凸体承载力以及转矩转速变化等建模分析,并采用有限差分法对修正雷诺方程求解,对挤压过程中的油膜压缩速度、油膜厚度变化率和片间承载力等挤压特性和转速、转矩等接合特性展开了仿真分析。并采用SAE#2试验机进行了相关试验获得了转速、转矩、压力、摩擦因数等数据,与仿真分析进行了对比。结果表明:湿式摩擦离合器接合过程可分为3个阶段,通常会在1 s内完成,在0.02 s左右开始从挤压阶段经压紧阶段在0.03 s左右过渡到全微凸体接触阶段,试验与理论分析结果一致。In view of the extrusion mechanism and micro-convex contact problem during the engagement process of the wet friction clutch,the oil groove structure on the surface of the friction plate,the material permeability and other factors were comprehensively considered;according to the modified Reynolds equation and the K-E(Kogut-Etsion)contact model,the wet friction clutch was squeezed in the process, the dynamic pressure bearing capacity, the bearing capacity of the micro convex body and the torque and speed change of the model were analyzed,and the modified Reynolds equation was solved by the finite difference method. For the extrusion characteristics such as the oil film compression speed, the oil film thickness change rate and the load bearing, and the engagement characteristics such as speed and torque, simulation analysis was carried out. And SAE#2 testing machine was used to carry out relevant tests to obtain data such as speed, torque, pressure, friction factor, etc., and compare them with the simulation analysis. Studies showed that the wet friction clutch engagement process can be divided into three stages,which were usually completed within 1 s,starting at about 0. 02 s and transitioning from the extrusion stage to the full micro-convex contact stage at about 0. 03 s after the compaction stage. The test results were consistent with the theoretical analysis results.

关 键 词：湿式离合器 雷诺方程 挤压过程 油膜压缩速度 转速转矩 

分 类 号：V229[航空宇航科学与技术—飞行器设计]